I had a little bit with my first...but that was partially to do with the fact that I wasn't eating when I took my prenatal tabs.... gross. None with my second...and SUPER bad with numbers three and four here (32 weeks right now) I found that mine went away at about 12 weeks. Rest lots...drink water if you can (I used to have to have flavored). Try ginger tea (some ginger root in hot water) or peppermint candy. That seemed to help me!